Corgatha obliquidisca Holloway sp. n.

♂♂ 8-9mm. This and the next two species are allied to C. prolectus Turner comb. n. (Queensland), transferred here from Enispa because of the similarity of its genital features to those of the Zitna group of Corgatha. The ground colour is a pale, slightly fawn grey with blackish, punctate or finely zigzag postmedial fasciae, that of the hindwing extensively pale yellow and irregular in several species. There are usually black discal marks on all the wings, and sometimes more extensive but less intense black shading (e.g. between the discal mark and a pale zigzag submarginal in prolectus). In obliquidisca there is usually a conspicuous oblique black bar in the discal position of the forewing and a less well developed one on the hindwing, where the postmedial is extensively yellow, somewhat broken with black edging on the basal side. The forewing postmedial is predominantly black and strongly curved around the discal mark to the costa. The margins of the wings are only finely edged black, whereas in prolectus they are more broadly dark vinous brown with the fringes yellowish; the forewing apex in prolectus is slightly falcate. The male genitalia of prolectus have the valves relatively short and broad, with a robust, slightly incurved saccular process and an angle representing the costal process just basad of centrally. The saccus is broad, rounded. In obliquidisca the valves are very narrow, elongate, with only a slight angle on the relatively straight costa. The saccular process arises opposite the angle and is delicate, tongue-like. The saccus is distinctly tapered to a narrow, rounded apex.

Holotype ♂

SABAH: Mt Kinabalu, 5500’, 17-19.i.1976 (E.W. Classey), BM noctuid slide 20224.

Paratypes

• 1♂ as holotype but 23-24.i.1976
• 1♂ (slide 21192) SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D.Holloway et al.), Site 14, February, Camp 2.5, Mulu, 1000m. 413461, lower montane for.
• 1♂ B.N. BORNEO: Mt Kinabalu, Lumu Lumu, 5500ft., April 14th, 1929 (H.M. Pendlebury).

Geographical range

Borneo.

Habitat preference

All specimens are from areas of montane forest.

Genitalia: